"combing" in the noun sense
1. comb, combing
the act of drawing a comb through hair
"his hair needed a comb"
"combing" in the verb sense
1. comb
straighten with a comb
"comb your hair"
2. comb, ransack
search thoroughly
"They combed the area for the missing child"
3. comb, comb out, disentangle
smoothen and neaten with or as with a comb
"comb your hair before dinner"
"comb the wool"
Source: WordNet® (An amazing lexical database of English)
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